package com.qk.filter;

import com.qk.utils.JwtUtils;
import jakarta.servlet.*;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;

import java.io.IOException;

/**
 * ClassName: TokenFilter
 * Package: com.qk.filter
 * Description:
 *
 * @Author zt
 * @Create 2025/7/31 16:56
 * @Version 1.0
 */
@Slf4j
//@WebFilter(urlPatterns = "/*")
public class TokenFilter implements Filter {

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {

        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;

        //1.获取请求路径
        String uri = request.getRequestURI();
        //2.判断是否是登录请求
        if(uri.contains("login")){
            log.info("登录请求：{}，放行", uri);
            filterChain.doFilter(request, response);
            return;
        }

        //3.获取请求头 token
        String jwt = request.getHeader("token");
        //4.判断token是否为空，如果不存在，响应401状态码
        if(jwt == null || jwt.isEmpty()){
            log.info("请求头token不存在");
            response.setStatus(401);
            return;
        }

        //5.解析令牌，如果解析令牌报错，响应401状态码
        try {
            JwtUtils.parseToken(jwt);
        }catch (Exception e) {
            log.info("令牌解析失败");
            response.setStatus(401);
            return;
        }
        //6.放行
        filterChain.doFilter(request, response);
    }
}
